Dryopteris karwinskyana Kuntze
Descripción
Rhizomes erect; rhizome scales concolorous, light brown, 7–11 X 0.5–1 mm, linear-lanceolate, margins with occasional teeth; fronds 20–60 cm long; stipes stramineous, 9–30 cm X 1.5–3(–4) mm, 1⁄4–1⁄2 the frond length, bases with light brown, linearlanceolate scales, densely glandular; blades chartaceous, green to yellow-green, deltate, 3-pinnate-pinnatifid at bases, otherwise mostly 2-pinnate-pinnatifid, 15–35 X 11–25 cm, with pinnae opposite to subopposite, spreading nearly 90° from rachises, 12–20 pairs; rachises stramineous, with scattered scales 3–4 X 0.3–0.5 mm, also with dense glandular hairs; proximal pinnae the longest, 7.5–13 X 2.5–6 cm, inequilateral, basiscopic basal pinnules 25–40 mm long, acroscopic basal pinnules shorter, 15–20 mm long; distal pinnae sessile or stalked to 3 mm, equilateral or slightly more developed acroscopically, pinnules acutely lobed or toothed; indument abaxially of dense whitish to yellowish, cylindrical glands 0.1–0.2 mm long on costae, veins, and laminae between veins, also of scattered hair-like scales 1–3 X 0.1–0.2 mm on costae, adaxially with similar dense glands; sori marginal, fertile zone limited to proximal and central part of fronds near pinna and pinnule bases, usually a single sorus per ultimate segment, indusia red-brown, thick, (1–)1.5–1.8 mm diam., vaulted, bearing dense, whitish, cylindrical glands; 2n=82 (Oax).A
Forma de vida
TerrestreA
Ejemplar revisado
Chis (Breedlove 40670, DS). Gro (Lorea 4895, FCME, IEB; Lyonnet 1722, CAS, US). Jal (Rzedowski & McVaugh 1372, ENCB). Méx (Matuda 31464, US). Mich (Lorea 1727, IEB, FCME; Ventura 2496, ENCB, LL, NY). Nay (McVaugh 16549, MICH, TEX, US). Oax (Mickel 6936, NY, UC). Sin (Brandegee s.n., UC, US).
Unverified, Doubtful, or Mistaken Reports. Dgo (Correll & Johnston 20134B, NY, cited by Mickel & Beitel, 1988, is D. cinnamomea). Tres Marias (reported by Lenz, 1995, but not verified).
A
Unverified, Doubtful, or Mistaken Reports. Dgo (Correll & Johnston 20134B, NY, cited by Mickel & Beitel, 1988, is D. cinnamomea). Tres Marias (reported by Lenz, 1995, but not verified).
A
Elevación
200 – 1300 mA
Ecología y Hábitat
Especially along streams.A
Tipo de vegetación
Bosque de encino, Selva altaA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This is a very distinctive species, not easily confused with any other species in the genus. The dense whitish or yellowish glandular hairs 0.1–0.2 mm everywhere on the laminae and indusia, large (1.5–1.8 mm), hemispherical, vaulted indusia, and the small ultimate and penultimate segments distinguish D. karwinskyana from members of D. patula complex. Dryopteris karwinskyana is restricted to the western states in Mexico, at relatively low elevations.A